43 Merge workbooks

12:55:33 Load MergeBook1 from Xlsx file
12:55:33 Read Xlsx format from /opt/bitnami/apache/htdocs/cdn/vendor/phpoffice/phpspreadsheet/samples/templates/43mergeBook1.xlsx in 0.0043 seconds
12:55:33 Load MergeBook2 from Xlsx file
12:55:33 Read Xlsx format from /opt/bitnami/apache/htdocs/cdn/vendor/phpoffice/phpspreadsheet/samples/templates/43mergeBook2.xlsx in 0.0024 seconds
12:55:33 Write Xlsx format to /tmp/phpspreadsheet/43_Merge_workbooks.xlsx in 0.0044 seconds
12:55:33 Write Xls format to /tmp/phpspreadsheet/43_Merge_workbooks.xls in 0.0035 seconds
12:55:33 Peak memory usage: 2MB